Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
  • B29D30/00—Producing pneumatic or solid tyres or parts thereof
  • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
  • B29D30/08—Building tyres
  • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
  • B29D30/24—Drums
  • B29D30/26—Accessories or details, e.g. membranes, transfer rings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
  • B29D30/00—Producing pneumatic or solid tyres or parts thereof
  • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
  • B29D30/08—Building tyres
  • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
  • B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
  • B29D30/00—Producing pneumatic or solid tyres or parts thereof
  • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
  • B29D30/08—Building tyres
  • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
  • B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
  • B29D2030/3214—Locking the beads on the drum; details of the drum in the bead locking areas, e.g. drum shoulders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
  • B29K2995/0037—Other properties
  • B29K2995/0072—Roughness, e.g. anti-slip
  • B29K2995/0074—Roughness, e.g. anti-slip patterned, grained

Definitions

• This invention pertains to apparatus useful in the manufacture of tires. More particularly, this invention pertains to a multi-piece sealing sleeve useful with a tire shaping drum to facilitate building and shaping of a tire carcass of the type used in the manufacture of radial automotive tires.
• Tires such as for example radial automotive tires, of the type having an inner liner, a plurality of body plies, sidewalls, and a plurality of beads disposed proximate an inner circumference of the tire, are known in the art. It is understood generally that in traditional tire manufacture, following initial preparation of various components to be used, a generally cylindrical tire carcass is built through a process of assembling various components of a tire onto one or more tire building drums. Such tire carcasses normally include tire components such as multiple plies of tire bands, yarns, and one or more annular reinforcing tire beads at opposite ends of the tire bands.
• the tire carcass is expanded to a toroidal shape with the plies of tire bands forming an outer circumference of the toroid and the tire beads forming inner circumferences of the toroid.
• additional material is added to the tire carcass to form an uncured or "green” tire.
• the green tire is then formed into a desired finished geometry and cured to allow the tire to retain the finished geometry, thereby completing manufacture of the tire.
• One apparatus and method useful in expanding a tire carcass to a toroidal shape is a tire shaping drum of the type discussed in United States Patent No. 4,325,764, issued to Appleby et al. (hereinafter "the '764 patent") .
• a tire carcass is placed over a tire shaping drum having a pair of segmented, radially expandable annular support structures, each support structure defining a radially expandable bead seat for establishing a firm frictional connection between the support structure and a reinforcing bead of the tire carcass.
• the annular support structures defining the bead seats are typically adjustably repositionable proximate one another along an axial dimension of the tire shaping drum to assist both in mating the bead seats to the reinforcing beads of the tire carcass and in shaping the tire carcass to a toroidal shape.
• the tire shaping drum is adapted to allow injection of air or other fluid between the tire carcass and a portion of the tire shaping drum between the bead seats to allow the tire carcass to be expanded to a toroidal shape.
• An annular sealing sleeve of a resilient material such as rubber, polymer, or the like, is provided along portions of the annular support structures between each radially expandable bead seat and an inner portion of the tire shaping drum to form a substantially airtight engagement between the tire carcass and the portion of the tire shaping drum interior of the bead seats.
• This expansion is typically accomplished through use of an annular frame having a plurality of inwardly facing hooks which are each extendable and retractable between a collapsed position and an expanded position.
• the hooks are adapted to be selectively extended inwardly of the annular frame to engage the replacement sleeve and selectively retracted toward the annular frame to stretch the replacement sleeve to an expanded geometry.
• the annular frame carrying the expanded annular sealing sleeve can then be positioned with respect to the tire shaping drum to surround the bead seat and inner portions of the annular support structure.
• the hooks of the annular frame can be selectively extended inwardly of the annular frame and disengaged from the annular sealing sleeve to allow the annular sealing sleeve to contract to fit along the bead seat and inner portions of the annular support structure.
• a multi-piece sealing sleeve for use with a tire shaping drum is disclosed herein.
• a typical tire shaping drum can include a support structure having a base portion and an annular, radially expandable and collapsible structure defining a bead seat.
• the bead seat can be radially expandable to engage a surrounding bead portion of a tire carcass.
• the multi-piece sealing sleeve comprises an annular first layer of substantially air- impermeable material having an inner edge sized to surround the tire shaping drum base portion and an outer edge extending radially outwardly to overlie at least a portion of the radially expandable and collapsible structure of the tire shaping drum.
• An annular second layer of substantially air- impermeable material is provided and sized to overlie and establish sealing engagement with at least a portion of the annular first layer and the bead seat portion of the tire shaping drum.
• the first and second layers thus cooperate to establish a substantially airtight seal between the tire shaping drum base portion and the bead seat.
• a fastener for securing at least one of the first and second layers along the radially expandable and collapsible structure of the tire shaping drum.
• the fastener is defined by at least one annular band sized to circumferentially surround and exert compression along at least a portion of at least one of said first and second layers.
• the fastener is configured to fit within a fastening groove defined by the radially expandable and collapsible structure of the tire shaping drum.
• FIG. 1 is an exploded view showing one embodiment of a multi-piece sealing sleeve for a tire shaping drum of the present invention, along with an annular support structure portion of a tire shaping drum;
• FIG. 2 is a perspective view of the multi-piece sealing sleeve for a tire shaping drum of FIG. 1 , shown positioned on the annular support structure of FIG. 1 ;
• FIG. 3 is a cross-sectional view of the multi-piece sealing sleeve for a tire shaping drum and annular support structure of FIG. 2, showing a close-up view of the multi-piece sealing sleeve for a tire shaping drum with the annular support structure in a collapsed position;
• FIG. 4 is a cross-sectional view of the multi-piece sealing sleeve for a tire shaping drum and annular support structure of FIG. 2, showing a close-up view of the multi-piece sealing sleeve for a tire shaping drum with the annular support structure in an expanded position;
• FIG. 5 is a cross-sectional view of another embodiment of a multi-piece sealing sleeve for a tire shaping drum, together with an annular support structure, and also showing a close-up view of the multi-piece sealing sleeve for a tire shaping drum with the annular support structure in a collapsed position;
• FIG. 6 is a cross-sectional view of another embodiment of a multi-piece sealing sleeve for a tire shaping drum, together with an annular support structure, and also showing a close-up view of the multi-piece sealing sleeve for a tire shaping drum with the annular support structure in a collapsed position.
• a multi-piece sealing sleeve is disclosed herein and in the accompanying
• the multi-piece sealing sleeve, or sleeve 10 includes a first annular layer 12 and a second annular layer 14 adapted to cooperate to conform generally to outer surfaces of an annular support structure 16 of a tire shaping drum to establish a substantially airtight seal between an interior portion of the support structure 16 and a bead portion 60 of a tire carcass (see Figure 4) positioned
• At least one fastener 24 is provided to secure at least one of the layers 12, 14 in place along the support structure 16.
• annular support structure 16 of a tire shaping drum having a generally cylindrical base portion 18 having an inboard end 32 which is adapted to be secured to additional apparatus of the type known in the art to form a complete tire shaping drum, and an outboard end 33 which is adapted to extend generally axially and cantilevered from the inboard end 32 to receive a bead portion 60 of a tire carcass surrounding the outboard end 33.
• a radially- expandable bead seat 20 is defined by a plurality of radially-extendable segments 26 disposed in a ring configuration about the outboard end 33 of the support structure 16.
• Each segment 26 is secured to the base portion 18 of the annular support structure 16 by suitable mechanical linkages 28 such that the segments 26 forming the bead seat 20 are radially expandable and contractable between a collapsed position (see Figure 3) and an expanded position (see Figure 4).
• the bead seat 20 defines generally a circumferential annular notch 34 shaped to receive a bead portion 60 of a tire carcass upon axial movement of the segments 26 toward the expanded position and into engagement with the tire carcass bead portion 60.
• the bead seat 20 defines a circumferential sealing flange 36 adapted to abut an interior side of the tire carcass bead portion 60 to encourage sealing engagement of the bead seat 20 with the tire carcass bead portion 60.
• An annular base flange 30 extends generally radially outwardly from the base portion 18 inboard of the linkages 28 toward the sealing flange 36.
• the base portion 18 and the base flange 30 are secured in a substantially airtight engagement as by, for example, an integral connection.
• the first layer 12 is defined by an annular, radially extendable and retractable layer of a material which is substantially impermeable to air, such as rubber, polymer, silicon rubber, or other suitable material.
• the first layer 12 is shaped and configured to extend along an interior surface 38 of the base flange 30 and to overlie at least a portion of the sealing flange 36 such that the first layer 12 provides a substantially airtight seal between the sealing flange 36 and the base flange 30.
• an inner edge 40 of the first layer 12 is disposed circumferentially along an intersection of the base flange 30 with the base portion 18.
• the inner edge 40 is configured to remain in place along the intersection of the base flange 30 with the base portion 18 throughout repositioning of the support structure 16 between the collapsed position ( Figure 3) and the expanded position ( Figure 4).
• a seating ring 46 is secured along the inner edge 40. The seating ring 46 is adapted to conform closely to the base portion 32 to hold the inner edge 40 of the first layer 12 in place along the base flange 30 proximate the base portion 32.
• the seating ring 46 is fitted to the annular intersection between the base flange 30 and the base portion 32, and is fabricated to be more resistant to elastic deformation than the remainder of the first layer 12, such that the seating ring 46 retains its shape as the remainder of the first layer 12 is reconfigured between the collapsed position ( Figure 3) and the expanded position ( Figure 4).
• the seating ring 46 is formed having a thicker cross-section than the thickness of the remainder of the first layer 12.
• the seating ring 46 is at least partially formed from a substantially non-elastic material, such as steel cable or other similar material.
• a circumferential clamp (not shown) is provided to secure the inner edge 40 of the first layer 12 in place along the base flange 30 proximate the base portion 18.
• proximate the base portion 18 will be readily known to one of ordinary skill in the art.
• an outer section 44 of the first layer 12 is disposed in overlying relation along the sealing flange 36 such that the first layer 12 establishes a substantially airtight barrier between the inboard end 32 of the base portion 18 and the space between the sealing flange 36 and the base flange 30.
• a central portion 42 of the first layer 12 is capable of radial expansion and contraction in order to allow the first layer 12 to maintain an overlying relation over the base flange 30 and the sealing flange 36, thereby maintaining the airtight seal between the sealing flange 36 and the inboard end 32 of the base portion 18, as the bead seat 20 is expanded and contracted between the contracted position and the expanded position.
• the central portion 42 is formed of an elastically deformable material, and preferably a resilient deformable material, such as rubber, polymer, silicon rubber, or the like, such that the first annular layer 12 is capable of expanding and contracting to remain generally conforming along the interior surface 38 of the base flange 30 and the surface of the sealing flange 36 as the annular support structure 16 is reconfigured between the collapsed position ( Figure 3) and the expanded position ( Figure 4).
• the first layer central portion 42 defines a series of expandable and collapsible annular folds 48 formed of a resilient deformable material as described above.
• the folds 48 allow the central portion 42 to unfold toward a flattened configuration when the support structure 16 is moved toward the expanded position (see Figure 4) and to return to a folded configuration when the support structure 16 is moved toward the collapsed position (see Figure 3).
• the central portion 42 is configured to stretch and contract such that the central portion 42 maintains a planar configuration along the interior surface 38 of the base flange 30 and the surface of the sealing flange 36 as the support structure 16 is reconfigured between the collapsed position and the expanded position.
• the second layer 14 is defined by a generally tubular expandable and contractable sleeve of material which, like the first layer 12, is substantially impermeable to air.
• the second layer 14 is shaped and configured to overlie and conform closely to at least a portion of the outer section 44 of the first layer 12 to frictionally engage at least a portion of the first layer 12, and also to overlie at least a portion of the radially- extendable segments 26 forming the bead seat 20.
• the second layer 14 is defined by a relatively smooth cylindrical tube formed of a resiliently elastic material, such as rubber, polymer, silicon rubber, or the like, and having a diameter slightly less than the diameter of the bead seat 20.
• the second layer 14 is adapted to stretch slightly to conform along the surface of the outer section 44 of the first layer 12 and the radially-extendable segments 26 when the support structure 16 is in the collapsed position (see Figure 3).
• the second layer 14 is adapted to stretch further to continue conforming along the surface of the outer section 44 of the first layer 12 and the radially-extendable segments 26.
• the second Layer 14 is defined by a tube-like structure having a contour which conforms to the surface of the outer section 44 of the first layer 12 and the radially-extendable segments 26, absent significant stretching of the second layer 14, when the support structure 16 is in the collapsed position.
• Placement of the second layer 14 along the outer section 44 of the first layer 12 and at least a portion of the radially-extendable segments 26 forming the bead seat 20 allows the second layer 14 to establish and maintain a substantially airtight surface along the sealing flange 36 and the bead seat 20 as the support structure 16 is reconfigured between the collapsed position and the expanded position.
• the second layer 14 upon placement of a tire carcass bead 60 in surrounding relationship about the bead seat 20 and expansion of the support structure 16 toward the tire carcass bead 60, the second layer 14 expands with the support structure 16 to establish sealing engagement between the tire carcass bead 60 and the bead seat 20.
• the first and second layers 12, 14 cooperate to form a substantially airtight seal between the tire carcass bead 60 and the inboard end 32 of the base structure 18.
• At least one fastener 24 is provided to secure at least one of the first and second layers 12, 14 in place along the support structure 16.
• the support structure 16 defines a circumferential fastener groove 50 outboard from the bead seat 20.
• the second layer 14 extends along and generally conforms to the contour of the fastener groove 50 and terminates proximate an exterior edge 52 thereof.
• the fastener 24 is defined by an annular band which is sized and configured for placement along the fastener groove 50 in overlying relationship with the portion of the second layer 14 within the fastener groove 50 to secure the second layer 14 proximate the support structure 16.
• the fastener 24 is fabricated from a resilient elastic material, such as rubber, polymer, silicon rubber, or the like, and has an unstretched circumference less than the circumference of the fastener groove 50, such that the fastener 24 may be stretched to fit within the fastener groove 50 and to exert compression along the portion of the second layer 14 disposed within the fastener groove 50, thereby biasing the second layer 14 against the support structure 16.
• the fastener 24 is defined by an adjustable non-elastic band, such as an adjustable hose clamp, zip tie, or other such adjustable non-elastic band, which is sized and adapted to be fitted within the fastener groove 50, to apply pressure to the portion of the second layer 14 within the fastener groove 50.
• the fastener 24 is defined by an annular band of material which is integrally formed with the second layer 14.
• the fastener 24 is not necessary to accomplish the sleeve 10 of the present invention.
• each of the first and second layers 12, 14 maintains a frictional connection with respective underlying portions of the support structure 16.
• the various regions and components of the first layer 12 are integrally formed such that the first layer 12
• the various regions of the second layer 14 are integrally formed such that the second layer 14 constitutes a unitary member.
• the central portion 42 of the first layer 12 is configured to extend primarily radially outwardly from the base portion 32 along the generally radially-extending interior surface 38 of the base flange 30.
• the first layer 12 of the sleeve 10 is significantly stretched to fit around the outboard end 33 of the support structure 16, including the radially-extendable segments 26, the linkages 28, and the base flange 30, and thereafter allowed to contract to fit the inner edge 40 of the first layer 12 around the intersection of the base flange 30 with the base portion 18, or (2) the support structure 16 is removed from the remainder of the tire shaping drum to allow the first layer 12 to be fitted over the inboard end 32 of the base portion 18 and against the base flange 30.
• the second layer 14 must be periodically replaced with a frequency approximating the frequency at which various prior art sleeves for a bead shaping drum must be replaced.
• the second layer 14 is configured to extend generally axially along the bead seat 20 defined by the radially-extendable segments 26 of the support structure 16.
• the second layer 14 is more easily replaceable than the first layer 12.
• the second layer 14 is only slightly stretched to fit the second layer 14 around the outboard end 33 of the support structure 16 and onto the radially-extendable segments 26.
• the second layer 14 and the fastener 24 are each is sized, shaped, and composed of material suitable to allow the second layer 14 and the fastener 24 to be fitted around the outboard end 33 of the support structure 16 and onto the radially-extendable segments 26 using finger pressure alone. Accordingly, it will be understood by one of skill in the art that use of the sleeve 10 provides significant reduction in the time, hassle, and hazards associated with replacement of the multi-piece sealing sleeve on a tire shaping drum.
• Figure 5 illustrates another embodiment of the sleeve 10'.
• respective exterior edges 54, 56 of the first and second layers 12', 14' each terminate at a point 58 along the radially-extendable segments 26 outboard of the fastener groove 50.
• the entire length of the second layer 14' overlies a portion of the first layer 12' and establishes frictional engagement with the first layer 12' to secure the second layer 14' in place relative to the first layer 12'.
• a plurality of fastener bands 24' are provided in overlying configuration within the groove 50 to secure both the first and second layers 12', 14' in place along the support structure 16.
• Figure 6 illustrates another embodiment of the sleeve 10".
• an interior surface 64 of the second layer 14" defines a textured surface, such as for example a ribbed, dimpled, or other textured surface.
• an exterior surface 62 of the first layer 12" also defines a textured surface, such that overlying portions of respective textured surfaces 62, 64 of the first and second layers 12", 14" establish frictional engagement with one another to provide a more secure frictional connection between the first and second layers 12", 14".
• respective textured surfaces 62, 64 of the first and second layers 12", 14" define complimentary mating surfaces, such that the respective textured surfaces 62, 64 of the first and second layers 12", 14" are adapted to mate together in overlying relation to one another.
• mating relationship is not necessary to accomplish the sleeve 10" of the present invention.
• the lower edge 40 of the first layer is adapted to establish locking engagement with the support structure 16 along an interface between the base portion 18 and the base flange 30.
• the lower edge 40" of the first layer 12" defines an annular, generally outboard-extending seating ring 46" which is secured along the first layer lower edge 40" by a suitable connection, such as for example an integral connection.
• a corresponding annular seating groove 66 is defined along an interface between the base portion 18 and the base flange 30.
• the seating ring 46" is adapted to be received within the seating groove 66 to establish frictional locking engagement between the lower edge 40" of the first layer 12" and the support structure 16.
• the fastener 24 defines a shape which is adapted to discourage rolling of the fastener 24".
• the fastener 24" defines an annular ring portion 68 sized to fit within and along the fastener groove 50 as described above, and an annular, radially-projecting lip 70 which extends outwardly from the fastener groove 50 along a circumference of the fastener 24".
• the lip 70 is adapted to abut a portion of the support structure 16 outboard from the fastener groove 50 to discourage rolling of the fastener 24" within the fastener groove 50, thereby maintaining a more secure, locking relationship between the fastener 24" and the support structure 16.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Tyre Moulding (AREA)
• Tires In General (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (2)

Family

ID=47437625

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (24)

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• 2011
  • 2011-07-05 US US13/176,396 patent/US20130008611A1/en not_active Abandoned
• 2012
  • 2012-06-26 WO PCT/US2012/044107 patent/WO2013006300A2/en active Application Filing
  • 2012-06-26 EP EP12807440.8A patent/EP2729298A4/en not_active Withdrawn
  • 2012-06-26 RU RU2014103811/11A patent/RU2014103811A/ru not_active Application Discontinuation
  • 2012-06-26 KR KR1020147002967A patent/KR20140060281A/ko not_active Application Discontinuation
  • 2012-06-26 CN CN201280039360.1A patent/CN103958170A/zh active Pending
• 2014
  • 2014-08-27 US US14/469,861 patent/US20140360672A1/en not_active Abandoned

Non-Patent Citations (1)

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